J/A+A/587/A65ivo://CDS.VizieR/J/A+A/587/A65doi:10.26093/cds/vizier.35870065CDSReiners A.Mrotzek N.Lemke U.Hinrichs J.Reinsch K.2017-11-30T12:56:38Z2016-02-17T09:40:31ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frthe-suninfrared-astronomyspectroscopyWe present a new solar flux atlas with the aim of understanding wavelength precision and accuracy in solar benchmark data. The atlas covers the wavelength range 405-2300nm and was observed at the Institut fur Astrophysik, Gottingen (IAG), with a Fourier transform spectrograph (FTS). In contrast to other FTS atlases, the entire visible wavelength range was observed simultaneously using only one spectrograph setting. We compare the wavelength solution of the new atlas to the Kitt Peak solar flux atlases and to the HARPS frequency-comb calibrated solar atlas. Comparison reveals systematics in the two Kitt Peak FTS atlases resulting from their wavelength scale construction, and shows consistency between the IAG and the HARPS atlas. We conclude that the IAG atlas is precise and accurate on the order of +/-10m/s in the wavelength range 405-1065nm, while the Kitt Peak atlases show deviations as large as several ten to 100m/s. We determine absolute convective blueshift across the spectrum from the IAG atlas and report slight differences relative to results from the Kitt Peak atlas that we attribute to the differences between wavelength scales. We conclude that benchmark solar data with accurate wavelength solution are crucial to better understand the effect of convection on stellar radial velocity measurements, which is one of the main limitations of Doppler spectroscopy at m/s precision.2016A&A...587A..65Rhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/587/A65CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/274/555 : Asymmetry of FeI lines in solar spectrum (Stathopoulou+ 1993)J/ApJS/91/461 : EUV spectrum of solar active region (Thomas+, 1994)J/A+AS/103/57 : Ion-atom collisions in Sun atmosphere (Mihajlov+ 1994)J/A+AS/113/71 : Lines in the infrared solar spectrum (Ramsauer+, 1995)J/A+AS/126/281 : Solar disk spectrum (660-1175A) (Curdt+ 1997)J/A+A/370/1071 : Fe XII UV line intensity ratios (Binello+, 2001)J/A+A/375/591 : SUMER Spectral Atlas of Solar Disk Features (Curdt+, 2001)J/A+A/432/1063 : Analysis of inner solar corona in Extreme-UV (Lanzafame+ 2005)J/A+A/507/417 : Oxygen lines in solar granulation. I. (Pereira+, 2009)J/ApJS/181/351 : Solar flux model in 30-1300nm wavelength range (Killen+, 2009)J/A+A/544/A125 : Solar lines from Ceres spectra (Molaro+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/587/A65https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/587/A65http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/587/A65https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/587/A65https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/587/A65http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/587/A65GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfraredOpticaldefaultJ/A+A/587/A65/tablea1Absolute convective blueshift of FeI lines measured from the IAG atlasrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaCentral wavelengths at rest (Nave et al., 1994, Cat. <J/ApJS/94/221>)nmem.wl.centraldoubleEW? Equivalent widths (disc centre) (Allende Prieto+ 1998, Car. <J/A+AS/129/41>)0.1pmspect.line.eqWidthintnullablerelDepthDepth flux at line center relative to unityphot.flux.density;arith.ratiofloatConvBS? Convective blueshiftm/sspect.dopplerVelocfloatnullableJ/A+A/587/A65/spnirNIR atlas 1000-2300nmrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWaveWavenumbercm**-1em.wavenumberdoublenFluxNormalized fluxphot.flux;arith.ratiodoublerFluxRaw (unnormalized) fluxphot.fluxdoubleJ/A+A/587/A65/spvisVIS atlas 405-1065nmrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWaveWavenumbercm**-1em.wavenumberdoublenFluxNormalized fluxphot.flux;arith.ratiodoublerFluxRaw (unnormalized) fluxphot.fluxdouble